ITEM DESCRIPTION: NOS Yamaha Piston, Standard Size. Yamaha Part #s 211-11631-00-96, 211-11631-01-96, 235-11631-00-96.
NOTE: The 211 # Supersedes to 235-11631-00-96 but the 211 # uses regular rings & the 235 # uses Keystone rings. These pistons are interchangeable as long as you mate with the correct rings.